Who should not use FAMVIR?
Anyone who is allergic to this product, its ingredients, or a medicine called Denavir (penciclovir cream) should not use FAMVIR. (Check with your healthcare provider for a complete list of ingredients.) FAMVIR tablets contain lactose. If you have rare hereditary problems of galactose intolerance, a severe lactase deficiency, or glucose-galactose malabsorption, you should not take FAMVIR tablets. Safety and effectiveness in children under the age of 18 years has not been demonstrated.